Regex Tester & Validator

This regex has two alternatives: the first matches text ending in a word followed by a space just before an opening parenthesis (via lookahead), useful for capturing a label or identifier preceding parentheses. The second matches a parenthesized timestamp like (2024_01_15 13_45_30 UTC), containing a date in YYYY_MM_DD format, time in HH_MM_SS format, and a 3-character timezone code. Commonly used with the global flag to parse log files or extract timestamped entries.